Is there any drawback if ERW pipe nozzle is used on the shell of atm water tank for more than 24" diameter size of nozzle?
Thanks in advance for assistance.
I am currently designing a LFO tank(Height is 12 meters). I need your help related to LFO inlet nozzle placement. Can you please advise where to place inlet nozzle, namely from bottom or up of the tank?
Kind Regards
Hi All,
I would like to ask a question regarding roof plate welding.
Currently we can not convince our consulting company. we designed roof plate overlapped each other in 50mm gaps and its welding is single side at the upside only. According to API650 ,single weld is applied and it is...
Dear Sirs,
We are currently in the process of applying for hot-tapping on natural gas pipeline. So, we are in difficulty to determine welding electrode type. Could you please recommend what we should select for welding electrode.
Material of TEE: ASTM A537, wall thickness:12mm
Material of Main...
Dear Sirs,
Could you please show a way how i can calculate stiffening scaffold or a provisional stiffening ring section area while tank is open-top during erection to prevent from bending of plate against harsh wind or vacuum effect.
For instance, for 5000 m3 tank(Diameter=25m , Height=12m)...
And the subject is different you mentioned. This is vacuum effect Not related with material quality or roof structure. This should be known by erectors more deeply and should think twice when they install tank against hurricane.
Dear Joe Tank,
"API-650 rerquires a minimum of 6 ft (1.8m) wide." this is not strict as i know. All shell courses are in same material quality undoubtedly.
The tank is supported cone roof. Collapse is totaly same as indicated above photos by Bonswa . Tank is 20.000 cubic meter. But there was no hole and stiffening ring. There was only guy wire. As i said when tank collapsed wind velocity was measured 95 mil/hour.
I wonder if we had executed all...
Dear Mr. Stephen,
Thanks a lot for your comment. Guy wire precaution had been taken while erection from several joints but stiffening scaffhold. Nonetheless, this collapse occured.
I have just witnessed collapse of API 650 HFO tank because of very harsh wind effect in erection situation. it was collapsed at the last course of shell. The top of tank was open. Wind velocity is 160 km/h at site and tank is located near seaside. However tank was safe according to the min...
